Furnace-head for gas-furnaces with changing direction of flames.



B. VERSEN. FURNACE HEAD FOB. GAS FURNACES WITH CHANGING DIRECTION OFFLAMES.

APPLICATION TILED JUNEB, 1909.

975,738; Patented Nov. 15, 1910.

2 SHEETS-SHEET 1.

Patented Nov. 15,1910.

HEETSBHEET 2.

BRUNO VERSEN, OF DORTMUND, GERMANY.

are.

Specification of Letters Patent.

Patented Nov. 15, 1910.

Application filed June 8, 1909. Serial No. 500,906.

T 0 all whom "it may concern:

Be it known that I, BRUNO VERSEN, a subject of the German Emperor, andresident of Dortmund, Germany, have invented certain new and usefulImprovements in Furnace- Heads for Gas-Furnaces with Changing Directionof Flames, of which the following is a specification.

This invention relates to furnaces and especially to that class ofmetallurgical or similar furnaces, which are heated by gas withsimultaneous introduction of air, and wherein in periodicalintermissions the direction of the introduced stream of gas and air isreversed.

An object of the invention is to improve the caloric efliciency of thefurnace by providing apertures in the furnace head for the escape of theheat, 2'. e. the combustion mixture of air and gas, said apertures beingdisposed atabout the same height as the apertures for the introductionof the gas. By this means the air which serves for raising thetemperature of the heating flame is maintained within said flame in theentire interior space of the furnace.

Another object of the invention is to provide means on the furnace headfor cooling the same and thereby increasing the durability of the head,said cooling means being simultaneously adapted to serve as reinforcingmeans for the head.

Other objects will be more clearly understood by reference to thefollowing specification and accompanying drawing and will be moreclearly pointed out in and by the appended claims.

In the drawing, Figure 1 is a longitudinal section through a furnacehead with parts of the furnace. Fig. 2 on the left hand side is a frontelevation of the furnace head and on the right hand side a rearelevation of the same, 2'. e. the furnace head seen from the inside ofthe furnace. Fig. 3 shows on the left hand side a transverse section ofthe furnace head on line AB of Fig. 1 and on the right hand side asection on line CD of Fig. 1. Fig. 4 is a perspective View of thefurnace head on a larger scale, the inner side of the furnace head beingshown exposed.

In the improved furnace head air is preferably conveyed through the sameby vertical lateral flues L, which open on or near the top of thefurnace into the same by a common port L. The gas may be conveyed to thefurnace by a flue advisably disposed between the air flue and openinginto the furnace by a port arranged below the common air port L. Belowthe common air port L branch flues Z extend from the lateral flues L andopen into the furnace advisably at the same height with respect to theopening of the gas flue G. At the period in which the head serves as anexhaust head the heat on the hearth of the furnace will be conveyedthrough the branch flues Z following the arrows 11 indicated in dashdotted lines on Fig. 4:. By this means the heat will be maintained inclose proximity to thematerial to be heated until said heat leaves thefurnace. l/Vhen the head serves as an intake head air in the form of ablast will be conveyed through the lateral flues L and owing to themomentum of the blast it will pass the branch flues Z without enteringthe same, but it will be rather conveyed into the furnace through thecommon port L as indicated in Fig. 4 by the arrows 18; the gas willleave the central flue in the direction indicated by the arrows 12. Buteven if air should enter the furnace through the lateral flues Z noobnoxious effect would be attained thereby, said air rather exerting acooling influence upon the neighboring parts and walls of said flues.

For the purpose of protecting the furnace head against prematuredeterioration, cooling pipes P are advisably embedded in the variousportions of the head. It is of advantage to divide these cooling meansin a plurality of systems, so that an equal cooling effect may beobtained in the various parts of the head. As shown in Figs. 1, 2 and 3,a plurality of cooling pipes are embedded between the common port L andthe gas port, other cooling pipes are arranged in the walls separatingthe branch fiues Z from the gas flues G while a third plurality of pipesare disposed in the walls between the main air fiues L and the branchflues Z. These systems of piping simultaneously serve as a reinforcingmeans for the entire furnace head in a very effective way, enabling thesame to resist vibrations and jars, especially when it is lifted off bymeans of a crane or when it is repaired.

On account of the advantageous distribution of the air, it is obviousthat the weight of the head may be decreased in comparison with a headof usual construction, so that even in very large furnaces these headsmay be removed and may be exchanged in a mannet which is ordinarily usedfor converters. Another advantage obtained thereby is the improvement ofthe heating effect which is smpan sd by conomic ad n ages anac'onsiderable saving in fuel. Another econstnissl. d an ag te t e tes asmaller furnace heads can more easily be replaced by entire new onesthan furnace heads of large dimensions. As the furnace head i compar ivy short, me sured in the dirs t ea'ot t l ng n a is of th fu nace, i s psible to ne' eass the length the heart h r by the pos b put Withoutincreasing the length of the .t'urnaee v r l I claim 1. In a furnacehead of the class described the combination of lateral air fiues and acentral gas fiue, said lateral fiues opening into the furnace in acommon portabove the port of saidcentral fine, and branch fiuesextending from said lateral fiues into the; furnace below said commonport.

In a furnace head of the class described the combination of lateral airfines and a cent al gas flue; sa d l t r l fiue p n g names into-thefurnace in a common port above the port of said central gas fine andbranch fiues extending from said lateral fiues and open ing into thefurnace at the height of the port of said gas flue.

ii In a furnace head of the class described the combination of lateralair fiues and a central gas flue, said lateral fiues opening into thefurnace in a common port above the portof the gas fiue, branch fiuesextending from said lateral fiues and opening into the furnace at theheight of the port of said gasvfiue, and cooling pipes embedded in theWall portions between the common port and the port of the gas fine, inthe Wall portions between the lateral fiues and the branch fiues, and inlateral Walls of the furnace head, said cooling pipes being adapted toserve as reinforcing means for the furnace head.

In testimony whereof I have hereunto set my hand in presenc of tw n s s-BRUNO ER E Witnesses:

we-Korma J- WEIG T-

